Towards Maximizing Throughput for Multithreaded Processes in Linux

CPU scheduler is a very important key concept in operating system which affects scheduling objectives and criteria. Choosing or modifying scheduling policy for running threads depends on predefined and specific objectives and criteria. In this paper, we investigate the effectiveness of thread weight readjustment scheduler (TWRS) for multithreaded processes in multitasking operating systems from the view point of throughput. TWRS is a proportional share CPU scheduler designed for scheduling multithreaded processes. In this work, we make change kernel performance significantly by modifying just few key parameters. We propose TWRS which preallocates certain amount of CPU time to each thread of the multi-threaded processes. The scheduler was implemented and evaluated under specific hardware and software environment. According to our evaluation results, our scheduler is promising to optimize some scheduling criteria.